PWM.rar_msp430产生pwm_电子设计大赛_电路设计

#include <msp430.h> #include"pwm_init_t.h" #include"msp_430_t.h" #include <msp430.h> #define uint unsigned int #define uchar unsigned char //***位操作***// #define P1BIT4_OUT_HIGH P1OUT |=BIT4 #define P1BIT4_OUT_LOW P1OUT &=~BIT4 #define P1BIT5_OUT_HIGH P1OUT |=BIT5 #define P1BIT5_OUT_LOW P1OUT &=~BIT5 #define P1BIT7_OUT_HIGH P1OUT |=BIT7 #define P1BIT7_OUT_LOW P1OUT &=~BIT7 #define P2BIT4_OUT_HIGH P2OUT |=BIT4 #define P2BIT4_OUT_LOW P2OUT &=~BIT4 #define P2BIT5_OUT_HIGH P2OUT |=BIT5 #define P2BIT5_OUT_LOW P2OUT &=~BIT5 #define P2BIT3_OUT_HIGH P2OUT |=BIT3 #define P2BIT3_OUT_LOW P2OUT &=~BIT3 unsigned char triangular[32]={0x00,0x10,0x20,0x30,0x40,0x50,0x60,0x70,0x80,0x90,0xa0,0xb0,0xc0,0xd0,0xe0,0xf0,0xfe,0xf0,0xe0,0xd0,0xc0,0xb0,0xa0,0x90,0x80,0x70,0x60,0x50,0x40,0x30,0x20,0x10}; unsigned char sinewav[16] ={0x00,0x31,0x61,0x8e,0xb4,0xd4,0xec,0xfb,0xfe,0xfb,0xec,0xd5,0xb5,0x8e,0x62,0x32}; void delay_t(int i) { volatile int x,y; for(x=i;x>0;x--) for(y=100;y>0;y--); } char pwm_duty_t(char pwms_x) { int i; char wave[32]; if(pwms_x == 0) for(i=0;i<32;i++) {wave[i]=triangular[i]; CCR1=wave[i]; delay_t(100); // for(i=0;i<16;i++) // wave[i]=0; else if(pwms_x == 1) for(i=0;i<16;i++) {wave[i]=sinewav[i]; CCR1=wave[i]; delay_t(100); // for(i=0;i<16;i++) // wave[i]=triangular[i]; // else if(pwms_x == 2) // for(i=0;i<16;i++) // wave[i]=sawtooth[i]; } } /* * pwm初始化函数 * * P1.2 Timer0_A ，捕捉:CCI0A输入 * P1.3 比较器输出 */ void pwm_init_t() { //***初始化端口***// P1DIR |= 0x04; // P1.2 and P1.3 output P1SEL |= 0x04; // P1.2 and P1.3 TA1/2 options // P2DIR |= 0x0C; // P2.2 和P2.3 为输出 // P2SEL |= 0x0C; // P2.2 和P2.3 分别为TB1 和TB2 CCR0 = 0xff; // PWM Period // TBCCR0 = 0xff; //PWM 的周期为256,也就是DAC 为8bit CCTL1 = OUTMOD_7; // CCR1 reset/set CCR1 = 0; // CCR1 PWM duty cycle TACTL |= TASSEL_2 + MC_1; // SMCLK, up mode // TACTL = TASSEL_2 + MC_3; // SMCLK, up-down mode // TACTL = TASSEL_1 + MC_1; // ACLK, up mode // TACTL = TASSEL_1 + MC_3; // ACLK, up-down mode } /* * PWM输出初始化（管脚设置） * * P1.2 比较模式：OUT1输出 * P1.0 作为ADC中断的指示灯 * 定时器启用单调增模式 */ void PWM_INIT_IO(void) { P1DIR |= BIT2 + BIT0; //设置IO P1SEL |= BIT2; P1BIT2_OUT_HIGH; //高电平初始化 TACTL |= TASSEL_2 + // 时钟源SMCLK ID0+ //输入不分频 MC_1+ //单调增模式 TAIE; //中断允许 TACCTL1 &= ~CAP; //比较模式 TACCTL1 = OUTMOD_6; //输出模式6：OUT1翻转/置位 CCR0 = PERIOD; CCR1 = 0; } void P1_3_interrupt_init(void) { P1DIR |= 0x01; // P1.0 output, else input P1OUT |= 0x08; // P1.3 set, else reset P1REN |= 0x08; // P1.3 pullup P1IE |= 0x08; // P1.3 interrupt enabled P1IES |= 0x08; // P1.3 Hi/lo edge P1IFG &= ~0x08; // P1.3 IFG cleared // _BIS_SR(LPM4_bits + GIE); // Enter LPM4 w/interrupt } void PORT_ISR(VOID) { delay(); P1IFG &= ~(BIT0); pwms_x=pwms_x+1; } void main(void) { WDTCTL = WDTPW + WDTHOLD; // Stop WDT pwm_init_t(); P1_3_interrupt_init(); char pwms_x=0; while(1) pwm_triangular(); }